Objective:

• Calendar -> Entity Maintenance
• Unable to view Calendar
• Padlock beside Calendar

Environment:

• Clio Web App

Additional Information:

For further information, please see: Why Does a Lock Icon Appear Beside Some Calendars? 

Answer:

This is because those Calendars were created/owned by other users and they've been shared with this secondary user, but with the Calendar Permission "Free/Busy (hide details)".